Merge remote-tracking branch 'upstream-public/pr/1900' into mbedtls-2.7

Add a Changelog entry
diff --git a/ChangeLog b/ChangeLog
index ec3e640..d287c5f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -11,6 +11,10 @@
      This improves compliance to RFC 4492, and as a result, solves
      interoperability issues with BouncyCastle. Raised by milenamil in #1157.
 
+Changes
+   * Improve compatibility with some alternative CCM implementations by using
+     CCM test vectors from RAM.
+
 = mbed TLS 2.7.5 branch released 2018-07-25
 
 Security